Preface

The 3 rd SEMADIK 2020: A National Seminar of Mathematics and Mathematics Education Anton Jaelani 1 , Wanda Nugroho Yanuarto 1 , Reni Untarti 1 and Puguh Wahyu Prasetyo 2 1 Universitas Muhammadiyah Purwokerto, Indonesia 2 Universitas Ahmad Dahlan, Yogyakarta, Indonesia E-mail: wandanugrohoyanuarto@ump.ac.id, antonjaelanime@gmail.com The 3 rd Semadik 2020 is the National Conference that organized by Mathematics Education Departement of Universitas Muhammadiyah Purwokerto, Indonesia. The aim of Semadik Conference is examining the linkages and implementation of science, technology, engineering, art, and mathematics in learning. Semadik is a forum for lecturers, practitioners, observers, researchers, and teachers/educators to share ideas/thoughts about science, technology, engineering, art, and mathematics in learning. The implementation of the National Seminar (SEMADIK 2020) which was originally held in April 2020 was changed in August 2020. The change in the implementation of this conference was due to the Covid-19 pandemic issues. The Semadik 2020 Conference was held online using the zoomcloud-meeting facility. The Semadik 2020 Conference was held online using the zoomcloud-meeting facility using the following schedules: 1. In the main session, the keynotes speaker presentation was held at 9 am to 11.30 am • The 1st Keynotes: Prof. Dr. Yus Mochamad Cholily, M.Si presented his insights “Mathematics and STEAM-Based Learning” at 9.15 am to 10 am • The 2nd Keynote: Drs. Hery Tarno. Dipl. HBT. MT. presented his insights “Mathematics Contributions in STEAM Learning” at 10.05 am to 10.50 am • The 3rd Keynote: Dr. Akhmad Jazuli, M.Si presented his insights “Mathematics Contributions towards Science in STEAM Learning” at 11 am – 11.30 am 2. In a parallel session, the presentation from the presenters was held at 1 pm-3pm. The parallel session was divided into 4 rooms with each room was 15 presenters. The discussion in the plenary session was held during the plenary session where each keynote was given 10 minutes discussion among participants. Meanwhile, the discussion for the parallel session were 5 minutes for each presenter. The process of parallel sessions was used the breakout room zoomcloud meeting facility. The Participants mostly came from The Java Island (80%), the remaining 20% came from Sumatra Island, West Nusa Tenggara, Sulawesi Island and Bali Island. The SEMADIK 2020 implementation was carried out using zoomcloud meeting technology and broadcasted in Youtube live in the University official account (Universitas Muhammadiyah Purwokerto: UMPtv). List of International Advisory Committee, Organizing Committee, Editorial Committee, Organizing Institutions are available in this pdf.